What are the 75 detected items, are these cookies that SAS is finding ? cookies are not viruses.

Slow system startups can be due to third party programs automatically running at system start, you can use CCleaner to look at what is automatically running at startup and disable "ITunes " is one obvious program that doesn’t need to start everytime you boot you system.

You also seem to have part of McAfee running at startup along with your AV (AVG ) which can be an issue and McAfee should be uninstalled immediately, the McAfee removal tool can be found here http://singularlabs.com/uninstallers/security-software/ 22a in the list