out of nowhere about a MONTH ago a box that says "windows-no disk, there is no disk in the drive. please insert a disk into drive." appered. every thing seems to still be runing ALRIGHT with my computer, just a little slow, some times i FREEZE and i am unable to burn anything. this box will not go away no matter how many times i close it. i really don't know much about computers if any one has experienced this or can tell me what is wrong i would be very thankful.Is you computer free of viruses & spyware?

Free Virus scan
http://www.pandasoftware.com/activescan/

Free Spyware scan
http://www.pandasoftware.com/products/spyxposer/com/spyxposer_principal.htmVirus scanners
AVG Free
-- Anti virus scanner
Trend Micro Housecall
-- Online anti virus scanner.

Anti spy/malware
Microsoft Antispyware
-- Anti spyware scanner. Windows XP HOME and Professional only.
Spybot Search & Destroy
-- Anti spyware scanner
Adaware SE Personal
-- Anti spyware scanner

Firewalls
Use both a hardware and software firewall.
Be advised as dual software firewalls may cause problems

ZoneAlarm Free
-- Free firewall - more user friendly
Sygate Personal
-- Free firewall - more configuration options

Removal tools
The following files are not substitutes for the ones described above.
They are either diagnostic tools or removal tools for malware of a certain kind

HijackThis
-- Manual malware remover. Post the HijackThis log generated only if requested!
McAfee Stinger
-- Virus removal tool. No substitute for a fully functional virus scanner!
CWshredder
-- CoolWebSearch removal tool. Widely known and persistant Hijacker.We may need a liitle bit more info on your question. Eleni Dimaioi have Avg virus scanner and it says i'm alright. what other info might u need to know? thanksIs you computer free of viruses & spyware?