PCs require regular maintenance or they inevitably get bogged down. Laptops seem to be more prone to this than desktops. Just basic stuff like: defrag all HDDs, check AV logs, empty recycle bin, clear browser cache/history/cookies/etc, clear temp files and download folder, uninstall unneeded programs, check MSCONFIG and disable unneeded start-up processes, reboot and check running processes and resources, backup critical data, and blow out the dust. This requires very little time and no specific expertise.
Even with regular maintenance, I reformat and do a clean install of the OS about every 2 years just to clean up the registry. I never use the manufacturer's disk which is loaded with bloatware. Only a clean and lean Windows OS disk. I then tweak the OS for optimum performance according to several online guides. My desktop is 8 years old, laptop is 6 years old and they're both running smooth and fast on Windows 7.
Even with regular maintenance, I reformat and do a clean install of the OS about every 2 years just to clean up the registry. I never use the manufacturer's disk which is loaded with bloatware. Only a clean and lean Windows OS disk. I then tweak the OS for optimum performance according to several online guides. My desktop is 8 years old, laptop is 6 years old and they're both running smooth and fast on Windows 7.