Apparently this is a common issue, but I have yet to find a solution for it.  I got my XPS L501X in November 2010, and since then, I've had this laptop hang or freeze randomly.  Recently, I've had a good stretch of a few months where it hasn't happened.  However, today has been horrible.  I have had to turn it off by pushing the power button literally more than 50 times.  And when I mean randomly, I do mean randomly -- during startup, while on the internet, while even browsing these forums and registering to post this.

My laptop specs from Dell Support Center:

Product: XPS L501X
Intel Core i7 CPU Q 740 @ 1.73 GHz
6GB RAM

Operating System
Microsoft Windows 7 Home Premium Edition (64-bit)
Build Number: 7601
DirectX Version: 11

System Board
Chipset: Intel PCH HM57
BIOS Version String: A07
SMBIOS Version: 2.6

If I need to include any more information, please tell me.