If your system is slow to load, you may have too many applications loading at startup
when Windows boots. Almost all applications you install want to startup when Windows loads. If you allow all these startups, they will compete for and use system resources resulting in poor performance and a slow system. Many of these programs are not needed and disabling them can save resources and improve performance as they can be accessed from Start > Programs or an icon on the desktop if needed. Other reasons for slowness include disk fragmentation, disk errors, corrupt system files, unnecessary services running, too many browser Add-ons/toolbars, failure to clear browser cache, not enough RAM, dirty hardware components, etc
As your system gets older it becomes filled with more files/programs and has a natural tendency to slow down so cleaning and regular maintenance is essential. For more information about trimming down the number of startup applications and other ways to improve performance, please refer to Slow Computer/Browser? Check here first; it may not be malware
If that does not resolve the slow startup issues, then reply back here.