The wallet is fully synced and there is no mining in process on my laptop. Virtacoin Core wallet is just idle and minimized into system tray, but it takes up 100% CPU load without doing absolutely nothing. I'm running Windows 10 by the way. The CPU is Intel Core i5-3210M Quad Core @ 2.50GHz
If you may, try figure out exactly what it is doing while using your full processing capacity. Make sure the mining (in the debug window) is set to false. If your quest for the 100% is not satisfied by the answers that you find, just exit the client until you need to transact using virtacoin.
Thanks for your advice, mate! After a bit of research made in Google, I have finally found the solution. It turns out that the wallet was mining in the background after all. I had to go to the appdata directory (in Windows) and inside the Virtacoin folder, you will find the virtacoin.conf file. Edit it with a text editor and where it says gen=1, replace it with gen=0. Then open the VTA wallet, and there you go. Now it takes only 2% of CPU usage.