Hello Cornelia ,

Thank you for posting your concern's here.

I am sorry to hear about the virus issue you have.

I would like to strongly suggest that you to use a highly sophisticated anti-virus or anti-malware program to keep your computer safe.

I suggest you to use SecurityReviver, you can download it from the link provided below.

http://dl.reviversof...

SecurityReviver will scan your computer for malware and virus threats, once it detected viruses and malware programs it will remove those unwanted programs on your computer in just a click of your finger.

Additional reference about SecurityReviver: http://reviversoft.c...

I hope SecurityReviver helps you with the virus issue you have.

If you have any other questions, please let me know and I will be more than happy to help you.

Best Regards,

Christian

Hi Cornelia,

Installing an antivirus program and keeping it up-to-date can help defend your computer against viruses. Antivirus programs scan for viruses trying to get into your email, operating system, or files.

One of the best tool for keeping your PC secured is Security Reviver.
It will scan your PC and identify security threats and vulnerabilities. Security Reviver can quickly and safely remove these threats and prevent them from reoccurring.

You can find more information about the product at the below link:

http://reviversoft.c...

You can also try below mentioned products to keep your PC secure.

1. Symantec Norton Security
Provides real-time protection against existing and emerging viruses and malware.Delivers comprehensive protection you can’t get from free antivirus software or your computer’s operating system.
It backs up your photos, financial files and other important documents of your choice on your Windows PC.2.Bitdefender Internet Security
The Bitdefender suite comes with Bitdefender Antivirus Plus - also available separately which works great. Ransomware protection can be quite handy as any unknown program looking to lock down your personal files for money will be halted.
Bitdefender does offer a free version of its antivirus tool so if the 30-day Internet Security trial doesn't have you convinced, go for that.

3. Kaspersky Internet Security
Unlike others, the Kaspersky firewall doesn't bother users and intelligently knows which programs to allow or block. It also won't throw pop-ups onto your screen whenever a new application has a request, and will decide on a level of access after studying things such as digital signatures.
It not only blacklists known scam sites but it can try to figure out newer ones using its heuristic analysis component. The software will even offer to scan through your installed applications and look for potential vulnerabilities.

But please keep in mind that an antivirus helps you in keeping your computer secure and not deals with the performance issues.

So, if you figure out that you have some performance issues, you can go the below link and explore various products from Reviversoft:
http://www.reviversoft.com/products/

You can also find the boot time of your laptop by following below steps.

1. Click Windows + W to jump directly to Search, type event, and select View event logs. 
2. In the Event Viewer, navigate to Applications and Services Logs ->Microsoft -> Windows -> Diagnostics Performance.
3. You can now view the log file that contains all events in that category. 
4. The Event ID to look for is 100.

Open the Details tab to find out what slows down the boot time of your computer.

I hope this helps.

Regards,
Lokesh