Its "Backup Exec Continuous Protection Agent", executable: rxservice.exe.
I only need to turn off this service to stop the server from locking up. The other Backup Exec services are not stopped.
CPU: Intel Xeon 2.80
Available Physical Memory: 941560 (K)
Total RAM: 1,5 Gb
Free Disk Space: 45Gb, 462Gb, 427Gb, 743Gb,
The server hangs regular until the service is turned off. Tried other services, but the only that stops the server from hanging is rxservice.exe.