welcome to the forum.
i think there is no problem with your english.
i suggest you do a boot scan with avast. and if avast finds any threats during the scan get avast the order to send them to the chest.
http://www.schmahl.net/avastbootscan.php - link to instruction how to make a boot scan.
second download, install, scan with malwarebyte antimalware, don’t forget to update its database before you do a scan.
http://filehippo.com/download_malwarebytes_anti_malware/ - link to malwarebytes.
if you still having problem after this two scans, i suggest you do a scan with hijack this and post the result here.
http://filehippo.com/download_hijackthis/- link to hijack this.
good luck and let us know on the progress or if you need more support.