If it sees to take your computer forever to boot up then you probably need to get some computer repair done on it. Slow boot ups and slow responses from programs are the main signs that the system has been infected with a spyware program. You need to get rid of the malicious intruder so your machine can return to working efficiently for you.
One way to do some computer repair for spyware infections is to have your antivirus software run a full system scan on your machine. There is a good chance that your software will catch the Trojan that has invaded your private space and eradicate it for you.
Your antivirus software can only perform these eradications if it recognizes the malware as a threat to your system. It can not recognize all of the threats it should know without you make sure that you accept all updates of the antivirus program. A lot of times people are in a hurry, or they think that these updates just take up valuable memory space, but the truth is the updates increase the number of viruses your antivirus knows the cure for.
If you are one of those people who have shut down your firewall at some time to allow you to do something you wanted to do that it was blocking, then you need to go check your firewall and reinstate it to recommended settings. These settings are recommended to protect you from virus invasions. Do not leave your firewall down.
You also need to keep your operating system updated and current. You are more than likely set up for automated updates on your operating system, unless you have disabled the automated updates. Many people believe that these updates are going to use up their memory so they prefer to select the ones they consider to be important. This can cause your machine to be more vulnerable than it should be. Keep your operating system updated to the latest level.
You are the key to stopping the Trojan invasion. The worst thing you can do is visit a porn site, download music or video from a shareware site, or download bootleg software. These things are very dangerous to your computer. They usually have more than one type of malware attached to them. Once the Trojan gets in it creates ways for others to follow. You should be aware of these things.