A new zero day issue has been found with Windows XP.
This is an issue that could mean criminals getting access to the computer, to either take control of it or gain information and data from it.
The flaw can be found within the XP Help and Support Centre.
It leaves the remote assistance tool vulnerable to being exploited and from here a hacker can do almost anything with the computer.
Hackers gain access through web sites that have commands embedded into them, which is how the hacker can activate the remote assistance tool.
According to the firm that found the issue, Tavis Ormandy, the flaw has been reported to Microsoft, which has begun looking into the problem.
However, at the same time, Microsoft has criticised the security firm for letting whole world known about this issue.