Query on unauthorized internet access???

 ya its true..some of the trojens and remote access systems are build to search IPs and then they try to find the injection hole...so tht they can access ur computer...the best way for safety from them is to install antivirus with internet security..

Yes, it is possible,

Be aware of spywares which may steal infromation from your system without your slightest knowledge. Install a good anti-spyware program with internet security to protect your PC.