Operative system not found

Hi all,

I have win95 installed on my PC. It has been working fine. Today when I reboot the machine efter some initialization I got the
message "Operative system not found". Why I get this message, what has happened to my machine? What I remember is that I did clean the place near the computer which might have caused that some cable gets loose, may this cause the error I get? or there is something else I have to check.
Please help me in this regard.
regards
/rsasalm

sounds like its having trouble finding the hard drive, or the boot sector might be having trouble. does it come up at all?

can you boot into safe mode?

try refastening all your cables, take them off. blow them out, and put them back on.

Never neglect the obvious......

Is there a floppy in the drive?