Computer freezing when logging in. + internet refuses to work

[fo631]

Win Vista 32bit.

So basically when i log into any user account on my pc it logs in, gets to desktop and when i click anything the screen turns transparent white, i waited for 2 hours, nothing happened so i restarted and tried again, only thing that seems to work is safemode.
I tried to use repair function on the boot cd, but my computer informed me to remove any media devices like cameras etc.
I have none connected, i tried removing everything but the keyboard, i even tried with a different keyboard, still same error.
I think it might be connected to that i installed my printers drivers recently.

Also my computer refuses to connect to the internet(connected directly to the router trough wire, it has worked for 2 years before also the laptops wifi connection works) , it tells me it has connection in "networking" window but it does not connect to it (internet sign with a red X on it on taskbar).

I have used ccleaner, scanned with hitmanpro3.5 and found no viruses.
My bitdefender, windows firewall and windows antivirus refuse to start working telling me there is some kind of unknown error.

I could format my harddrive and reinstall windows but i have no place to backup my files. also system restore did not work because my restore points have disappeared.

I think that should be all.

//i logged in and could use my windows in normal mode when it gave me the option "use last good know settings" and i noticed no strange processes in the task manager, but it was only for once and has not worked with "last good known settings" anymore.

[alphaspida]

Buy a cheap flash drive, backup, reformat with a better operating system.