xp support

I think no more support for XP Mode, but Microsoft doesn´t said about this.

If your PC has internet access on which you are running xp mode, you will run into security issues if you keep on running it. So your current priority should be to migrate any software or hardware that requires you running XP mode to something that runs natively on Windows 7.

Of you don't access the internet with that PC, the danger is lower.

I don't know  about XP mode. but do agree with Rindi about security issues.  Having said that though, your security should NOT be solely based on XP updates. Some of this will depend on what regulations you are under that may force you to move away from XP and how good the rest of your security is.  If you have a good hardware-based firewall that will continue to work as will your AV solution and any IPS/IDS device you might be using.  If you have implemented good multi-layered security, I'm not sure I'd lose an sleep over it, but at the same time, that's a judgement call that needs to be made with the above as concerns.

At end of life for XP no further development of updates/fixes will be pursued, that includes security or any other issue. So, although the probability of a new security issue for XP is small it does exist, and therefore it is highly recommended you upgrade your OS prior to end of life.