Windows vista keeps freezing and unresponsive programs+ appHang(bluescreen)

I seem to hava a problem with my Windows Vista-on my Toshiba A205
specs
Genuine Windows Vista Home Premium
Intel Core 2 Duo Processor T5500
1.66GHz, 2MB L2, 667MHz FSB with 64-bit
2048MB PC2-5300 DDR2 SDRAM memory
250GB (4200 RPM) Serial-ATA (SATA) hard disk drive
1280x800 native resolution (XWGA)
Intel Graphics Media Accelerator 950 with 8MB-256MB dynamically allocated shared graphics memory

The problem is that when i play loud music or some games independently the computer freezes for a long time and i have to shut it down plus recently it takes about 3-5 minutes to boot up and load and even after loading any simple action from running an application to pressing the windows keypad button causes it to freeze.Windows explorer and some software applications also keep indicating that they are not responding.There's also the bluescreen error report(appHangB1) I've tried the system files scan in command prompt(safe mode) but it runs to 77% and indicates Human Resource or problem cannot be completed,also i;ve tried checking the disk for errors,virus scan,registry mechanic,system restore but nothing seems to work.

I urgently need some advice on how to handle this.Any reply will be kindly appreciated.
Charles,IT student

Find in C:\Windows\Minidump any *.DMP files and debug them - it may help you to diagnose problem.See below how to do.How to read the small memory dump files that Windows creates for debugging

Hi cwgitahi1390, welcome to the board.

Besides posting your error report as suggested by Flavius, you may try to restore to the restore point before problem occurred.

Another thing you may look at is the possibility of over heat. Your Toshiba gets extremely hot at time especially when the air intake on the bottom is obstructed. If you have the pc for over 6 months, I would suggest you or ask a knowledgeable person to open it up to clean all the dust balls off the heatsink and the rest of the interior. You may give it a wild spray with can air if you really don't want to taking it apart but it is not as efficient.

Hope this helps and report back.

Bruce