Windows installer takes up ~85% of disk space

Hi all,

So I've been having disk space issues lately on my windows XP machine. After downloading TreeSize, I found that ~67 GB of my ~80 GB hard drive are taken up by Windows Installer Files. These are mostly .msp files (in total, there are 11,657 files taking up 66.7 of the 67 GB).

I've read around and read various things about these files, but I wanted to come here to get some confirmation about how to remove these files (if I can remove these files). It seems like a lot of them are duplicates, I'm looking for a good quick clean way to get rid of the dups, or just a nice simple way to decrease the size of this folder in general without destorying my computer. I see no reason that these files should take up 67 GB.

Specs below.



Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows XP Professional, Service Pack 3, 32 bit
Processor: Genuine Intel(R) CPU T2400 @ 1.83GHz, x86 Family 6 Model 14 Stepping 8
Processor Count: 2
RAM: 1022 Mb
Graphics Card: ATI Mobility Radeon X1300, 128 Mb
Hard Drives: C: Total - 81564 MB, Free - 485 MB; D: Total - 27156 MB, Free - 17812 MB;
Motherboard: Dell Inc., 0XD720
Antivirus: Microsoft Security Essentials, Updated: Yes, On-Demand Scanner: Enabled