How do you rollback your computer?

[DR0]

I went into MSCONFIG and unchecked everything, restarted and then Firefox wasn't working so I went back and reinstalled it and now it still doesnt work
all I get is Network Error :/
IE, AIM anything internet-based still works escept Firefox :/

 

[MixedLogik]

System Restore.

Start, All Programs, Accessories, System Tools, System Restore.

Warning- You'll lose all progress since that date!

 

[DR0]

thanks a bunch. :]