Yes, basically, it would. The root cause is either (a) a build up of malware or (b) the middle-aged bloat that the Windows registry and directory always develops with age coupled with heavy fragmentation of the file system.
None of that will be cured by copying or imaging, but can be improved drastically with little effort and no ill effects.
1) Get yourself stuff like A², Ewido etc. and run them. click here click here
2) Get CCleaner click here and wipe out all the crap.
3) Enter Program Files and delete any old folders that relate to deleted software.
4) Defragment the disk.