Ben even voor je op zoek geweest...
In de onofficiele faq van planethalflife staat het volgende:
Your Half-Life executable has been modified
As soon as you run Half-Life (or the Half-Life dedicated server HLDS.exe), Half-Life checks itself to determine if the Half-Life executable you are running has been damaged or altered in any way. The most likely causes of such damage are:
1. Computer viruses (very common).
2. You modified the executable (common).
Solution: You probably ran some type of cracking program, most common is the no CD type. Since you have already ran the no CD crack, you may be forced to reinstall Half-Life again.
3. Corrupt portions of a user's hard disk drive (rare). Solution: run ScanDisk