take too much time to load windows

[matsoppi]

   :-?
when I started up my pc, it goes like usual until it load windows to display desktop screen. It take too much time (3-5 minutes).. I also have my friend who his pc take about 15 minute to load into windows desktop... What problems cause such symptom... Someone know how to fix it... thanx

[GX1_Man]

Malware (spyware/adware/virii)

Not enough free disk space

Background processes running at startup which are not needed

Not enough RAM if using XP

Defective hardware

That's for starters.  

[rockerest]

I'd say it's probably one of the first three.....

[Mr_President]

Also ridding the registry of obsolete items and using a registry optimiser can help.

DISK CLEANUP