Windows 7: 2 to 3 crashes per day

OS Name Microsoft Windows 7 Professional Students Upgrade
System Model Dimension 8250
System Type X86-based PC
Processor Intel(R) Pentium(R) 4 CPU 3.06GHz, 3049 Mhz, 1 Core(s), 2 Logical Processor(s)
BIOS Version/Date Dell Computer Corporation A04, 1/9/2004
Installed Physical Memory (RAM) 1.25 GB
Total Physical Memory 1.25 GB
Available Physical Memory 584 MB
Total Virtual Memory 2.79 GB
Available Virtual Memory 1.80 GB
Page File Space 1.54 GB

Had Xp. Done a clean install, installed applications and manually moved files. Have resolved many issues with drivers etc. but I am still getting two or three blue screens a day. This blue screen issue is a new venture for me.

Attach the .dmp files found in your C:\Windows\Minidump.

Here's the last two from yesterday