ImpaqSpeed is an adware that will attempt to commandeer your browser search and homepage. The adware will send you to malicious websites to get money from you or infect your computer further. It may also prevent you from changing your settings back. ImpaqSpeed is usually installed through bundled software without you knowing.
Presented as a legitimate program, ImpaqSpeed is a helpful tool that will allow you to measure your Internet performance directly from your desktop. It may sound like a useful and handy utility but this so-called program will displace tons of undesired and intrusive advertisements or banners leading to harmful pages.
You probably don’t remember installing it but its contamination can be quite obvious hence you’ll discover it soon enough. Try your best to remove it instantly so as not to have your system infected.