Webpage opens up after startup on Lenovo laptop

[Triple JJJ]

I have two problems with my laptop: when booting, it shows a page of some website in other language to which it is to install anything, and I can since into several more are easily accessible with the message that certificate not yet valid, and I therefore may be associated with a "attackers" instead of my page. My virus program has found no viruses or other. what can I do

[REDBULL]

I think you should install the Microsoft Security Essential application on your system and check whether there is a virus on your system. I would like to know whether you can install the application if you are not able to install it then you can achieve it in the safe mode. Install it and then simply scan and dump the virus and the problem will be fixed.

[Level8]

You can use the AntiVir Personal Free Antivirus from your computer equipped with effective protection against viruses and removes unwanted guests quickly and reliably. The user has two security features are available: While the integrated real-time scanner continuously monitors your system can browse cautious contemporaries with the file examiner individual downloads, complete folders or the entire disk by hand for pests.

[arturro]

This is simply because of a virus and so you will have to get rid of the virus which is redirecting your system to a unknown webpage. I would advice you not to go online unless and until you get rid of this virus this is just a safety measure to make your data secure enough. However you will have to go online for the installation of the Microsoft Security Essential. Download it install it scan using the application and remove the virus so that the problem will be fixed.