when i start up my pc monitor,it becomes only black n gray after half an hr it comes to its orignal position n sometimes the monitor shows nothing is there is any viruslaptop tips .at the time of start up sometime we cannot see even anything on my monitor pls help me it is a big problemLaptop Screen.

Need more information such as make and model of monitor and computer. The age and OS of computer. Most important is are you getting error messages or POST signals at boot up that you can see or hear? Have you tried updating your video drivers?

Not all problems like yours are related to malware. Especially if you have a very old CRT type monitor or you are using a very old computer.

do you mean it is failing to post? (ie the text stuff when u first start it up isnt there) this would prob mean ur motherboard is failing

I had same problem i sold out and bought new one....
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The problem that you are discussing here may be due to problem in voltage,means the voltage provided by your ups may be fluctuating .