Windows 7: Windows 7 Won't Start Up, startup repairs and system restore can't fix

I bought Acer aspire one D270. My computer worked fine for 1,5 week. But I got blue screen at last night.I tried startup repairs and system restore.

Startup Repair diagnosis and repair log
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Last successful boot time: ‎1/‎26/‎2013 8:40:50 AM (GMT)
Number of repair attempts: 7

Session details
---------------------------
System Disk = \Device\Harddisk0
Windows directory = D:\Windows
AutoChk Run = 0
Number of root causes = 1

Test Performed:
---------------------------
Name: Check for updates
Result: Completed successfully. Error code = 0x0
Time taken = 0 ms

Test Performed:
---------------------------
Name: System disk test
Result: Completed successfully. Error code = 0x0
Time taken = 15 ms

Test Performed:
---------------------------
Name: Disk failure diagnosis
Result: Completed successfully. Error code = 0x0
Time taken = 328 ms

Test Performed:
---------------------------
Name: Disk metadata test
Result: Completed successfully. Error code = 0x0
Time taken = 47 ms

Test Performed:
---------------------------
Name: Target OS test
Result: Completed successfully. Error code = 0x0
Time taken = 280 ms

Test Performed:
---------------------------
Name: Volume content check
Result: Completed successfully. Error code = 0x0
Time taken = 188 ms

Test Performed:
---------------------------
Name: Boot manager diagnosis
Result: Completed successfully. Error code = 0x0
Time taken = 0 ms

Test Performed:
---------------------------
Name: System boot log diagnosis
Result: Completed successfully. Error code = 0x0
Time taken = 0 ms

Test Performed:
---------------------------
Name: Event log diagnosis
Result: Completed successfully. Error code = 0x0
Time taken = 156 ms

Test Performed:
---------------------------
Name: Internal state check
Result: Completed successfully. Error code = 0x0
Time taken = 78 ms

Root cause found:
---------------------------
Startup Repair has tried several times but still cannot

determine the cause of the problem.

---------------------------
---------------------------
Session details
---------------------------
System Disk = \Device\Harddisk0
Windows directory = D:\Windows
AutoChk Run = 0
Number of root causes = 1

Test Performed:
---------------------------
Name: Check for updates
Result: Completed successfully. Error code = 0x0
Time taken = 0 ms

Test Performed:
---------------------------
Name: System disk test
Result: Completed successfully. Error code = 0x0
Time taken = 15 ms

Test Performed:
---------------------------
Name: Disk failure diagnosis
Result: Completed successfully. Error code = 0x0
Time taken = 328 ms

Test Performed:
---------------------------
Name: Disk metadata test
Result: Completed successfully. Error code = 0x0
Time taken = 47 ms

Test Performed:
---------------------------
Name: Target OS test
Result: Completed successfully. Error code = 0x0
Time taken = 280 ms

Test Performed:
---------------------------
Name: Volume content check
Result: Completed successfully. Error code = 0x0
Time taken = 188 ms

Test Performed:
---------------------------
Name: Boot manager diagnosis
Result: Completed successfully. Error code = 0x0
Time taken = 0 ms

Test Performed:
---------------------------
Name: System boot log diagnosis
Result: Completed successfully. Error code = 0x0
Time taken = 0 ms

Test Performed:
---------------------------
Name: Event log diagnosis
Result: Completed successfully. Error code = 0x0
Time taken = 156 ms

Test Performed:
---------------------------
Name: Internal state check
Result: Completed successfully. Error code = 0x0
Time taken = 31 ms



Root cause found:
---------------------------
Startup Repair has tried several times but still cannot

determine the cause of the problem.

---------------------------
---------------------------
Session details
---------------------------
System Disk = \Device\Harddisk0
Windows directory = D:\Windows
AutoChk Run = 0
Number of root causes = 1

Test Performed:
---------------------------
Name: Check for updates
Result: Completed successfully. Error code = 0x0
Time taken = 16 ms

Test Performed:
---------------------------
Name: System disk test
Result: Completed successfully. Error code = 0x0
Time taken = 0 ms

Test Performed:
---------------------------
Name: Disk failure diagnosis
Result: Completed successfully. Error code = 0x0
Time taken = 327 ms

Test Performed:
---------------------------
Name: Disk metadata test
Result: Completed successfully. Error code = 0x0
Time taken = 47 ms

Test Performed:
---------------------------
Name: Target OS test
Result: Completed successfully. Error code = 0x0
Time taken = 281 ms

Test Performed:
---------------------------
Name: Volume content check
Result: Completed successfully. Error code = 0x0
Time taken = 187 ms

Test Performed:
---------------------------
Name: Boot manager diagnosis
Result: Completed successfully. Error code = 0x0
Time taken = 0 ms

Test Performed:
---------------------------
Name: System boot log diagnosis
Result: Completed successfully. Error code = 0x0
Time taken = 0 ms

Test Performed:
---------------------------
Name: Event log diagnosis
Result: Completed successfully. Error code = 0x0
Time taken = 156 ms

Test Performed:
---------------------------
Name: Internal state check
Result: Completed successfully. Error code = 0x0
Time taken = 62 ms

Test Performed:
---------------------------
Name: Boot status test
Result: Completed successfully. Error code = 0x0
Time taken = 32 ms

Test Performed:
---------------------------
Name: Setup state check
Result: Completed successfully. Error code = 0x0
Time taken = 670 ms

Test Performed:
---------------------------
Name: Registry hives test
Result: Completed successfully. Error code = 0x0
Time taken = 3339 ms

Test Performed:
---------------------------
Name: Windows boot log diagnosis
Result: Completed successfully. Error code = 0x0
Time taken = 0 ms

Test Performed:
---------------------------
Name: Bugcheck analysis
Result: Completed successfully. Error code = 0x0
Time taken = 1373 ms

Root cause found:
---------------------------
Unknown Bugcheck: Bugcheck 7e. Parameters = 0xc0000005,

0x86a8b886, 0x878a3b4c, 0x878a3730.

Repair action: System Restore
Result: Failed. Error code = 0x490
Time taken = 0 ms

Repair action: System files integrity check and repair
Result: Failed. Error code = 0x490
Time taken = 1380297 ms

---------------------------
---------------------------



And I tried in safe mode and got this:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.768.11
Locale ID: 2067

Additional information about the problem:
BCCode: 1000007e
BCP1: C000005
BCP2: 86A66886
BCP3: 8789B4C
BCP4: 87897730
OS Version: 6_1_7601
Service Pack: 1_0

Product: 768_1

Help me please!

If you are going to post that much data then put it in a Code Box using the # on reply box toolbar.

Work through these steps which try everything possible for Troubleshooting Windows 7 Failure to Boot.

The steps lead up to if necessary rescuiing your files to run Acer eRecovery or get the superior Clean Reinstall following the steps to get and keep a perfect install.