Excell rolls back changes x minutes after saving. Causes?

Question

Network administration

An employee on his work computer has some Excell files behaving strangely.
If you make any changes to the file and save it, then opening it after a few minutes, there would be no changes as if there were none.
Right in front of me, the renamed file took its former name in a few minutes.
Excell 2003, XP, office computer.
Googling, I did not find a solution, but I saw that similar problems sometimes happen.
For now, I assume that there may be some problem with the hard drive or the network (in the office there is a domain).
Perhaps the question is trivial. Then I would ask to throw off a couple of sources that I need to read in order to begin to understand the issue. Thank you.

Answer 1

check for viruses py and network storage, put an audit on the network folder and look at the logs

Answer 2

Very similar to how SFC works.
If you do not enter the domain, but log in as a local user, is it the same?

Answer 3

The feeling that some kind of cloud is configured and the folder is synchronized from it.