Massive Problems With my Sentia

Well i bought a used sentia to take notes on in class needed a battery it worked fine under outlet power for awhile i bought a new battery. Now ive been having crazy problems. WIndows wont start it gets stuck in a auto restart loop so i turned it off and found a blue screen. I also found out that the cd drive isnt showing up some times... and if i open it and close it it restarts... Its a dvr drive that was added after the laptop was purchased. Not sure if this is causing a problem...Well this is really bothering me. I got a blue screen messgae of Kernal_data_inpage_Error i ran check disk and it was clear... I dont know what to do ive reformated and respawned several times... Nothing seems to fix my problem. Once it is running though it runs fine besides 2 small dead pixels... Any sugestions... Stop:
0x0000007a
Dont know if there is a better place for this if so mods please move this
thanks,
adam

 

Before we start looking into this, which windows operating system are you using on your Sentia?

Most stop messages are associated with faulty RAM, but I think this problem is associated with your hard drive. For starters, you can refer to this for more information: http://support.microsoft.com/kb/130801

 

Sorry about that. XP home... The person i bought it from said he upgraded the ram as well...

 

I looked through even viewer and i see a bunch of errors saying the cdrom drive has a bad block...???? There are also many other errors as well

 

How recent was the RAM upgrade?

Edit: Double click on the error and it should give you a more detailed description of it. If it gives you a link, please click on that as well. Microsoft normally provides a suggestion/solution to fixing the issue.