没有找到操作系统

当我启动电脑时，它启动得很好。

但当我重新启动电脑时，我得到以下错误。

未找到操作系统。尝试断开任何不包含操作系统的驱动器。

按Ctrl+Alt+Del重启

我的BIOS最近更新了。在更新之前，错误仍然发生。

我正在运行Windows 8.1 x64。

我的电脑规格如下。我把相关信息放在最上面。

Motherboard

    Name ASUS M5A97 EVO R2.0

BIOS
Name To be filled by O.E.M.
Description 2005
Vendor American Megatrends Inc.
Version 2005
Date 20130916

Harddisk 0
Name WDC WD5001AALS-00L3B2
Description Disk drive
Vendor (Standard disk drives)
Capacity 476938 MB
Interface Type SATA
Serial Number WD-WMASZ0136444
Firmware Revision 01.03B01
Model Number WDC WD5001AALS-00L3B2
Removable false
Support DMA true
Support LBA true
Support SATA true
SATA Generation Gen 2
Sector Total 268435455
Maximum Queue Depth 31
Highest Supported ATA Version 8
Security Supported true
Security Enabled false
Security Locked false
Security Frozen true
Security Count Expired false
Security Enchanced true

Harddisk 1
Name WDC WD10EZEX-00KUWA0
Description Disk drive
Vendor (Standard disk drives)
Capacity 953867 MB
Interface Type SATA
Serial Number WD-WCC1S4545930
Firmware Revision 15.01H15
Model Number WDC WD10EZEX-00KUWA0
Removable false
Support DMA true
Support LBA true
Support SATA true
SATA Generation Gen 3
Sector Total 268435455
Maximum Queue Depth 31
Highest Supported ATA Version 8
Security Supported true
Security Enabled false
Security Locked false
Security Frozen true
Security Count Expired false
Security Enchanced true

CPU 0
Name AMD FX(tm)-8350 Eight-Core Processor           
Description Family 15-6 Model 2-0 Stepping 0
Vendor AuthenticAMD
Max Frequency 6300 MHz
Start Voltage 1.1625 V
Min Voltage 0.0125 V
Max Voltage 1.55 V
Max Ramp Voltage 0 V
Max Multiplier 31.5 X
Start Multiplier 5 X
L1 Data Cache Size 16 KB
L1 Data Cache Associativity 4
L1 Data Cache Lines 1
L1 Data Cache Line Size 64 Bytes
L1 Instruction Cache Size 64 KB
L1 Instruction Cache Associativity 2
L1 Instruction Cache Lines 1
L1 Instruction Cache Line Size 64 Bytes
L2 Cache Size 2048 KB
L2 Cache Associativity 16
L2 Cache Lines 1
L2 Cache Line Size 64 Bytes

CPU 1
Name AMD FX(tm)-8350 Eight-Core Processor           
Description Family 15-6 Model 2-0 Stepping 0
Vendor AuthenticAMD
Max Frequency 6300 MHz
Start Voltage 1.1625 V
Min Voltage 0.0125 V
Max Voltage 1.55 V
Max Ramp Voltage 0 V
Max Multiplier 31.5 X
Start Multiplier 5 X
L1 Data Cache Size 16 KB
L1 Data Cache Associativity 4
L1 Data Cache Lines 1
L1 Data Cache Line Size 64 Bytes
L1 Instruction Cache Size 64 KB
L1 Instruction Cache Associativity 2
L1 Instruction Cache Lines 1
L1 Instruction Cache Line Size 64 Bytes
L2 Cache Size 2048 KB
L2 Cache Associativity 16
L2 Cache Lines 1
L2 Cache Line Size 64 Bytes

CPU 2
Name AMD FX(tm)-8350 Eight-Core Processor           
Description Family 15-6 Model 2-0 Stepping 0
Vendor AuthenticAMD
Max Frequency 6300 MHz
Start Voltage 1.1625 V
Min Voltage 0.0125 V
Max Voltage 1.55 V
Max Ramp Voltage 0 V
Max Multiplier 31.5 X
Start Multiplier 5 X
L1 Data Cache Size 16 KB
L1 Data Cache Associativity 4
L1 Data Cache Lines 1
L1 Data Cache Line Size 64 Bytes
L1 Instruction Cache Size 64 KB
L1 Instruction Cache Associativity 2
L1 Instruction Cache Lines 1
L1 Instruction Cache Line Size 64 Bytes
L2 Cache Size 2048 KB
L2 Cache Associativity 16
L2 Cache Lines 1
L2 Cache Line Size 64 Bytes

CPU 3
Name AMD FX(tm)-8350 Eight-Core Processor           
Description Family 15-6 Model 2-0 Stepping 0
Vendor AuthenticAMD
Max Frequency 6300 MHz
Start Voltage 1.1625 V
Min Voltage 0.0125 V
Max Voltage 1.55 V
Max Ramp Voltage 0 V
Max Multiplier 31.5 X
Start Multiplier 5 X
L1 Data Cache Size 16 KB
L1 Data Cache Associativity 4
L1 Data Cache Lines 1
L1 Data Cache Line Size 64 Bytes
L1 Instruction Cache Size 64 KB
L1 Instruction Cache Associativity 2
L1 Instruction Cache Lines 1
L1 Instruction Cache Line Size 64 Bytes
L2 Cache Size 2048 KB
L2 Cache Associativity 16
L2 Cache Lines 1
L2 Cache Line Size 64 Bytes

CPU 4
Name AMD FX(tm)-8350 Eight-Core Processor           
Description Family 15-6 Model 2-0 Stepping 0
Vendor AuthenticAMD
Max Frequency 6300 MHz
Start Voltage 1.1625 V
Min Voltage 0.0125 V
Max Voltage 1.55 V
Max Ramp Voltage 0 V
Max Multiplier 31.5 X
Start Multiplier 5 X
L1 Data Cache Size 16 KB
L1 Data Cache Associativity 4
L1 Data Cache Lines 1
L1 Data Cache Line Size 64 Bytes
L1 Instruction Cache Size 64 KB
L1 Instruction Cache Associativity 2
L1 Instruction Cache Lines 1
L1 Instruction Cache Line Size 64 Bytes
L2 Cache Size 2048 KB
L2 Cache Associativity 16
L2 Cache Lines 1
L2 Cache Line Size 64 Bytes

CPU 5
Name AMD FX(tm)-8350 Eight-Core Processor           
Description Family 15-6 Model 2-0 Stepping 0
Vendor AuthenticAMD
Max Frequency 6300 MHz
Start Voltage 1.1625 V
Min Voltage 0.0125 V
Max Voltage 1.55 V
Max Ramp Voltage 0 V
Max Multiplier 31.5 X
Start Multiplier 5 X
L1 Data Cache Size 16 KB
L1 Data Cache Associativity 4
L1 Data Cache Lines 1
L1 Data Cache Line Size 64 Bytes
L1 Instruction Cache Size 64 KB
L1 Instruction Cache Associativity 2
L1 Instruction Cache Lines 1
L1 Instruction Cache Line Size 64 Bytes
L2 Cache Size 2048 KB
L2 Cache Associativity 16
L2 Cache Lines 1
L2 Cache Line Size 64 Bytes

CPU 6
Name AMD FX(tm)-8350 Eight-Core Processor           
Description Family 15-6 Model 2-0 Stepping 0
Vendor AuthenticAMD
Max Frequency 6300 MHz
Start Voltage 1.1625 V
Min Voltage 0.0125 V
Max Voltage 1.55 V
Max Ramp Voltage 0 V
Max Multiplier 31.5 X
Start Multiplier 5 X
L1 Data Cache Size 16 KB
L1 Data Cache Associativity 4
L1 Data Cache Lines 1
L1 Data Cache Line Size 64 Bytes
L1 Instruction Cache Size 64 KB
L1 Instruction Cache Associativity 2
L1 Instruction Cache Lines 1
L1 Instruction Cache Line Size 64 Bytes
L2 Cache Size 2048 KB
L2 Cache Associativity 16
L2 Cache Lines 1
L2 Cache Line Size 64 Bytes

CPU 7
Name AMD FX(tm)-8350 Eight-Core Processor           
Description Family 15-6 Model 2-0 Stepping 0
Vendor AuthenticAMD
Max Frequency 6300 MHz
Start Voltage 1.1625 V
Min Voltage 0.0125 V
Max Voltage 1.55 V
Max Ramp Voltage 0 V
Max Multiplier 31.5 X
Start Multiplier 5 X
L1 Data Cache Size 16 KB
L1 Data Cache Associativity 4
L1 Data Cache Lines 1
L1 Data Cache Line Size 64 Bytes
L1 Instruction Cache Size 64 KB
L1 Instruction Cache Associativity 2
L1 Instruction Cache Lines 1
L1 Instruction Cache Line Size 64 Bytes
L2 Cache Size 2048 KB
L2 Cache Associativity 16
L2 Cache Lines 1
L2 Cache Line Size 64 Bytes

HTLink 0
HT0 Multiplier 11 X
HT0 Width In 16 bits
HT0 Width Out 16 bits
HT0 Max Width In 16 bits
HT0 Max Width Out 16 bits
HT1 Multiplier 1 X
HT1 Width In 8 bits
HT1 Width Out 8 bits
HT1 Max Width In 8 bits
HT1 Max Width Out 8 bits
HT2 Multiplier 1 X
HT2 Width In 8 bits
HT2 Width Out 8 bits
HT2 Max Width In 8 bits
HT2 Max Width Out 8 bits
HT3 Multiplier 1 X
HT3 Width In 8 bits
HT3 Width Out 8 bits
HT3 Max Width In 8 bits
HT3 Max Width Out 8 bits

Memory 0
Name Physical Memory 0
Description                             
Vendor Team Group Inc.
Capacity 8192 MB
Max Bandwidth 10.7 GB/s
Part Number Vulcan-1600       
Serial Number 0
Data Width 64 bits
Bus Frequency 685.714 MHz
Slot Location Slot 2

Memory 1
Name Physical Memory 1
Description                             
Vendor Team Group Inc.
Capacity 8192 MB
Max Bandwidth 10.7 GB/s
Part Number Vulcan-1600       
Serial Number 0
Data Width 64 bits
Bus Frequency 685.714 MHz
Slot Location Slot 3

Monitor 0
Name Generic PnP Monitor
Description Generic PnP Monitor
Vendor (Standard monitor types)
Screen Width 1600 pixels
Screen Height 900 pixels
Max Width 1600 pixels
Max Height 900 pixels
Refresh Rate 0 Hz
Pixels Per XLogical Inch 96 pixels
Pixels Per YLogical Inch 96 pixels

USB Controller 0
Name EHCI USB Controller
Description EHCI USB Controller
Vendor AuthenticAMD

USB Controller 1
Name EHCI USB Controller
Description EHCI USB Controller
Vendor AuthenticAMD

USB Controller 2
Name EHCI USB Controller
Description EHCI USB Controller
Vendor AuthenticAMD

USB Controller 3
Name OHCI USB Controller
Description OHCI USB Controller
Vendor AuthenticAMD
Enhanced (101- or 102-key)              

USB Controller 4
Name OHCI USB Controller
Description OHCI USB Controller
Vendor AuthenticAMD

USB Controller 5
Name OHCI USB Controller
Description OHCI USB Controller
Vendor AuthenticAMD

USB Controller 6
Name OHCI USB Controller
Description OHCI USB Controller
Vendor AuthenticAMD
``` 我的电脑规格如下。