Cant start up windows

[Perk]

Hello
I was googling the web to see if I could speed up the startup-time for my PC, and I found this posted by someone in a forum:
"msconfig -> services -> hide all microsoft services -> uncheck these if they exist: xaudio, vongo, stllsvr,roxmediad89, installdriver table manager, cyberlink background, cyberlink task,

Then click on boot tab ->advanced options -> number of processors 2 -> maximum memory."

I did this and now I cant start up Windows at all, just before the log-in screen I get a blue screen with a text that disappear before I have any time to read it. Is there any way to change it all back to my previous settings without entering Windows?

I have a stationary Dell, 2,4 dual-core, 2GB Windows Vista Service Pack 2

[Allan]

Boot to safe mode and reset everything to the way it was. While there, go to System Properties - Advanced - Startup & Recovery Settings and uncheck "automatically restart"

[Perk]

The same thing happens when I try the safe mode

[patio]

Follow the instructions...

[Allan]

As the system starts to boot tap the F8 key. You should get to a screen with several boot options - choose "Disable restart on error" (not sure of the exact wording). Reboot. What is the blue screen error message you now see?

[Perk]

OK, the blue screen says:
"Check for viruses om your computer. Remove any newly installed hard drives or hard drives controllers. Check your hard drive to make sure it is properly configured and terminated. Run CHKDSK /F to check for hard drive corruption, and then restart your computer.
Technical information:
*** STOP: 0x0000007b (0x80399BB0, 0x00000000, 0x00000000)"

[Allan]

1) Boot to the Recovery Console and run chkdsk /r
2) Boot to your AV disc and run a scan
3) Can you now boot to either normal or safe mode? if not then

4) Boot to the XP CD and choose the SECOND repair option and do a repair install.

[Perk]

I'm really sorry for not knowing this but what is my AV disc? 

[Allan]

Sorry. The cd for your Anti Virus utility. I'd like you to run a scan at boot.

[Perk]

Im afraid I dont have any Anti-Virus disc, nor do I have any OS-disc since Vista was factory-installed. Do you think it would be better if I called some expert to come and check my computer, or would this be useless and should I just buy a new OS?

[Allan]

Sorry - forgot this was a Vista issue and not XP.

1) You can download a bootable AV utility (http://www.techmixer.com/kaspersky-rescue-disk-load-kaspersky-antivirus-2009-using-dos/)
2) Can you borrow a Vista Disk and boot to the Repair Options?

[Perk]

Ok, i´m going to try that tomorrow, its getting late here in Sweden. But thanks alot for the help so far!

[Allan]

I'm afraid I haven't been much help so far, but you're welcome

[patio]

Vista Repair CD

[Allan]

Vista Repair CD

There you go - thanks for that Patio