@Electric_Banana Said
EDIT: Before all this make sure to jot down your passwords for sites.
Open any window in Windows and go to
Tools> Folder Options> View
And check the radial button for "Show hidden files and folders"
Next enter 'My Computer' and enter C drive (Local Disc) (assuming you only have one drive)
You may or may not have to exit past a security warning about tampering with files.
You're going to want to clear these caches
c:\Documents and Settings\*User Name**\Local Files\Temp
*Note that some files in this folder may not delete - just let them be*
c:\Documents and Settings\*User Name*\Local Files\Temporary Internet Files
If using Chrome:
c:\Documents and Settings\*User Name*\Local Settings\Application Data\Google\Chrome\UserData\Default\PepperData\ShockwaveFlash\CacheWritableAdobeRoot\AssetCache <----might hold some marketing ware clogging things up.
Ditto for
c:\Documents and Settings\*User Name*\Local Settings\Application Data\Google\Chrome\User Data\Default\Pepper Data\Shockwave Flash\WritableRoot\#SharedObjects <---Everything in here starting with # will need to get dumped. Generally folders starting with the pound sign and named after a company ie; "#y.yahoo.com"
C:\Documents and Settings\*User Name*\Local Settings\Application Data\Google\Chrome\User Data\Default\Pepper Data\Shockwave Flash\WritableRoot\macromedia.com\support\flashplayer\sys
More stuff to dump in here:
C:\Documents and Settings\*User Name*\Local Settings\Application Data\Google\Chrome\User Data\Default\Media Cache
and here:
C:\Documents and Settings\*User Name*\Local Settings\Application Data\Google\Chrome\User Data\Default\Cache
Finally go and get (it's free)
https://download.cnet.com/CCleaner/3000-18512_4-10315544.html
Run 'Clean and 'Registry'
Last but not least also go and get (it's free)
https://download.cnet.com/Auslogics-Disk-Defrag/3000-2094_4-10567503.html?tag=mncol;1
And finish up with an anti-malware program.
That's a bunch of pretty complicated instructions for someone to follow, especially considering they won't do anything to address her issues.
Better advice would be to install Malwarebytes or SuperAntiSpyware, reboot into safe mode, and run a full system scan.