Windows 7 - HP TX2032AU Problems

Before this i have a problem with the fresh instal win 7 , the error code was 0x0008057 if i were not mistaken, it were about the Partition problem , but recently i replaced the original HDD with new HDD.. i Buy 500gb SATA HDD.. but the problem was , after i install the new HDD with new OS again it gave me problem .. this time it does not give any error but , after finish install , the System gone Lag and it annoyed me and everyone who use that computer.. in your opinion what r the problems? is it Motherboard? CPU Fan ? or the Screen Flickering.. I already try to reinstall fresh copy and also reinsert the HDD but still same problem ...

My CPU Spec was ..

HP Pavilion tx2032 With AMD Athloc 64x processor , 2gb ram , 500gb hdd and currently not installing OS... Please help me .....

This is really hard to say since the laptop specs are not complete or available for most people that post on this forum.

Could you describe where you are at right now for confirmation? From what I can gather the installation completed but the system is slow and laggy now, is that correct?

Without being 100% sure on the processor that would seem to be a very old processor that would not keep up very well with windows 7. If your processor is truly an AMD Athlon 64 you might want to stay at XP, although there are some tricks to get Windows 7 to work in a minimum mode it will never be lag free compared to windows xp. Also if the laptop is old enough to include an Athlon 64 most likely you will not be able to get the video driver, so that would cause a lot of graphical lag.

If you would like to verify that your computer is able to work with windows 7 you might want to download this MS tool. (this tools runs inside a windows environment)

Work through these troubleshooting steps which lead up to a possible clean reinstall, but with steps to get it perfect based on thousands we've helped with here.