Do you remember if you installed any hardware or software before it started? Have you considered spyware/malware/adware?
If you have not considered the latter I would suggest getting something like "spybot search and destroy" and giving that a try.
Surface Pro 5 News - release date, UK price, features, specs
Animator Emanuele Kabu’s psychedelic video is a stunning tribute to Lisbon city
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Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.