System clock going slow

Hi Sir,

My system clock is not being able to match up with the proper time when i boot up my machine... it is lagging behind by approximately something around 7 or 8 hours,whenever i boot my pc for the first time the clock is not displaying the proper time,but after rectifying it if i restart or shut down,& boot up again then it keeps displaying the correct time.But when i start my pc the next day my system clock again is lagging behind & i have to make manual adjustments to make it correct... i don't know why this is happening. I have Quickheal Guardian Antivirus which gets updated regularly.. so i scanned my system with it ,but i did not find any virus but it did find a Malware,& i removed it with the help of my antivirus but still the problem is not over yet.

One thing i would like to inform you is that one week earlier I installed Linux(Fedora 16 ,64 bit),dual boot with my Windows 7 Ultimate(64 bit), after that i am noticing this problem. Previosly my system's clock used to display dates & times of 2 or 3 months ahead from the current date,but after the malware scanning & removal now the date is being displayed correctly but it is lagging in time only.I don't know whether this has anything to do with it or not but still i preferred not to keep anything hidden from you..

Looking for your help.

Thanks in advance......

Hey get a PC not a laptop problem solved

Yeah .my time zone is set correctly from the time when i installed my Win7 1 & half months earlier... I am from India,the only suitable time zone for me is " (U.T.C + 05:30) Chennai,Kolkata,Mumbai,New Delhi " ,& it is set accordingly by me. i told you in my original post that i have been experiencing this problem from the past 1 week or so.. this is a recent issue,

I assembled my system in January,2009.. so it is something more than 4 yrs old..

I used to have a UPS from very beginning.. but it has just stopped functioning recently(for nearly 1 month), and currently i'm running my pc directly by plugging it in to a extension cord & plugging in the extension cord to the wall sockets.

please help me find some solutions or tweaks.
Looking for your assistance..

Thanks in advance

Change your nickel-sized motherboard battery as WHS suggested.

Four to five years is their life span on a pc that is shut down every day; in my experience.

Those that run 24/7 can go 7-8 years.