Many users have expressed discontent with their computer. It is running slow. You're finding popups everywhere. Something is wrong. Its taking 20 minutes to boot.
Here's what I recommend for most systems that have been in use for over a year, but have never had any IT maintenance performed...
anti-virus
defragmentation
disk scan
eset
indexing options
kaspersky
malware
malwarebytes
optimization
performance
registry cleaner
safe mode
slow boot
software tools
superantispyware
system maintenance
trojanremover
user recommendations
windows 7
windows vista