I have my computer running for over 2 months now and it seems like every day that goes past it gets slower! Does anyone have any idea on what could be slowing it down? Because when I first turned it on everything was running really fast. For example if I opened any folder it opened in about 1-2 seconds but now it takes longer then 15 seconds.

Could you provide us with your system specs (system make and model, processor, RAM, hard drive, video card, etc). If you don't know this info, you can find it with this free download: http://www.gtopala.com/index.html

Also, please take a look at your Event Viewer. To do this, go to Start and type in "eventvwr.msc" (without the quotes) and press Enter. Click on the + sign by Windows logs, then click on both the Application and System logfiles. Please note any errors that you see.

Finally, please go to Start and type in "perfmon.msc" (without the quotes) and then press Enter. Click on the Reliability Monitor and let us know what errors show up there.

1.73GHz Intel® Celeron®M Processor 430(1Mb L2 Cache, 533MHz Front Side Bus)
15.4" WXGA High-Definition BrightView Widescreen Display
80GB (5400RPM) Hard Drive
512MB DDr2 SDRAM (1 Dimm)
Intel Graphics Media Accelerator 950 (64MB Available RAM)

Event Viewer:
The device, \Device\Harddisk0\DR0, has a bad block.

Your machine is generally a little underwhelming when it comes to running Vista, but the bad block is the biggest problem. Run chkdsk c: /f /r in an command prompt (you get one by writing cmd in the start search).

I've got an Acer laptop with only 512 mB of RAM (and Vista Home Basic), I've also run an older Toshiba with beta versions of Vista Ultimate on only 512 mB of RAM. While RAM isn't the only problem that could be causing the slowdown - it's the most likely one outside of the bad block on the hard drive.

A bad block will cause the computer to search more times for the data it needs - which will slow the system down since accessing the hard drive is usually the slowest part of running Windows. After the bad block problem is fixed you'll probably still notice the slowdown. FWIW, I put another gig of RAM into the Acer the other day and it picked up a bit (but not as much as I'd expect 1.5 gB to do) - but this is an office computer, so it may be related to things that the users have done to it. My Toshiba runs Vista Ultimate quite well with only 1 gB of RAM (I use it when traveling) and I have no issues with it (although I have tweaked the performance settings a bit).