Problem is when i turn on my pc, after a boot screen i get blue screen for about 2-3 seconds with text, and then my pc restarts and all over again. I can't load windows now. Im 100% sure that the problem is not virus because i just installed clean Windows Vista Ultimate. I cant read the text, its too fast, but i see something like dumping memory and when it gets to 100% then restarts. Theres one time i didnt get that blue screen, but monitor didnt turn on. So i left it with monitor off and after 5 minutes it restarted it self again. What the hack am i supposed to do. Oh, i installed AusLogic boost speed and disabled sys restore, super fetch, enabled lvl2 cach and disabled applicated compability engine. maybe that caused the problem. Im reeeaaallly angry. Please help before i turn my pc into pieces.

I finaly managed to get into the windows.i got Windows Has Recovered from an unexpected shutdown. Then i got these informations

Problem Event Name: BlueScreen
OS Version: 6.0.6.001.2.1.0.256.1
Locale ID: 1033

Additional Informations about the problem:
BCCode: a
BCP1: 00000000
BCP2: 0000001B
BCP3: 00000001
BCP4: 81861B5B
OS version: 6_0_6001
Service Pack: 1_0
Product: 256_1

Files that describe the problem:
C:\Windows\Minidump\Mini111309-04.dmp
C:\Users\pro\AppData\Local\Temp\WER-74609-0.sysdata.xml
C:\Users\pro\AppData\Local\Temp\WER34D6.tmp.version.txt

The first one - minidump, showes some letters that i dont understand
second one - that xml file shows my pc configuration
the last one - txt file showes:

Windows NT Version 6.0 Build: 6001 Service Pack 1
Product (0x1): Windows Vista (TM) Ultimate
Edition: Ultimate
BuildString: 6001.18000.x86fre. longhorn_rtm. 080118-1840
Flavor: MultiProcessor Free
Architecture: x86
LCID: 1033