I had set up my computer at work for remote access so I could work from home. We are a small company and being the youngest employee I have become our IT department. Set up the router for port forwarding and everything was working great. I could have complete remote access from my home computer to my work computer. This worked great for about 5 months. A few weeks ago the connection stopped working, I get an error message at home saying the remote connection is failing and it's possible that the remote computer is turned off. It's definitely not turned off and it just seemed to randomly stop working. I'm sure I screwed something up without knowing but have no idea where to start looking. Any help would be greatly appreciated, thanks.

Can you remote from within your office, if yes, please check port forwarding on router, or you can reconfigure it. If you are not able to remote from withing the office. please check if remote is enabled on the computer, do you have any firewall running (windows firewall or some antivirus)?-V