Why does avast want me to do a boot time scan
I want to do a virus scan and when I click scan it says boot time scan. I don’t even know what that is or what to do if it finds something.There are no other options in drop down box. That is kinda strange.How do I change it back to jut a regular scan please?
I did smart scan it is fine
Repair Avast:
Thanks so much
I did as you requested and it still wants to scan in boot time.
I went into control panel. I did not see avast icon so I went into
programs and features and clicked on avast in list, it gave option to uninstall or repair I clicked rapair and it seemed to be doing a restore if I am not mistaken and restarted and went back into avast and clicked scan and it still has scan in boot time although it says boot time not scheduled. I don’t understand this at all.Could the free avast have changed the way it scans?I know it does updates from time to time but it should allow me to do just a fullscan.
Thanks
free,what I don’t get is there is only the option to boot-time scan, there is not another choice in drop down box. Thanks
o.k. you lost me on this part (Run this tool for all prior installed Avast versions…!!)
3. Reinstall Avast with the downloaded installer from point 1.
I think i can run that tool but do I download avast first, it seems I download it twice. I am trying to understand this and thank you.
The instructions are as easy as they can get. Which part don’t you understand…?? ???
Thank you I assure you I am tryng my best,
I dont understand
2. Follow instructions: https://www.avast.com/uninstall-utility (Run this tool for all prior installed Avast versions…!!)
how do I do this ?
what do you mean point 1
I am not trying to cause any problems I am trying to do this the right way
I thank you.
Maybe this helps 
Uninstall utility tutorial https://www.avast.com/en-eu/faq.php?article=AVKB10#articleContent
Click on Detailed Steps.
Greetz, Red.
Hopefully Red, I’m soon out of ideas on how to explain it any easier. 
I am sorry I am not a computer expert, so sorry I don’t understand how to do things that I am not use to doing. Most people here are very patient and if people don’t understand or afraid to do a task asked they just try and help again.
Please know I thank you for your help but your previous remarks are not called for.I would never reply to a poster in such a demeaning way.As a physically disabled person I need my computer to communicate so I came here for help.
Thank you rednose that was a very kind way to explain things.
Asyn I won’t bother you futher.
Sometimes remarks sound harsh because language barriers. Most of us who help here, English is our second language even a third. So sometimes explaning something in different ways is not easy.
Did you finally reinstall Avast running avasclear first ? Is it working now ? I mean the options for different scans are showing. If Not try to follow this:
Install from scratch:
1.) Very important to remove all remains of other AVs installed before Avast. Use this site to execute uninstall utilities for other AVs.
http://www.avast.com/faq.php?article=AVKB11#artTitle or http://singularlabs.com/uninstallers/security-software/
2.) Download and save to your desktop avastclear.exe
3.) Download and save a fresh copy of Avast!. Be sure to have your lincense handy if running a paid version.
http://files.avast.com/iavs9x/avast_free_antivirus_setup.exe
http://files.avast.com/iavs9x/avast_pro_antivirus_setup.exe
http://files.avast.com/iavs9x/avast_internet_security_setup.exe
http://files.avast.com/iavs9x/avast_premier_antivirus_setup.exe
4.) Open Avast! > Settings > Troubleshooting > Uncheck " Enable Avast! self-defense module ".
5.) Uninstall Avast! normally through Control Panel > Programs & feature ( Vista, W7, W8 ) or Add and remove programs ( XP ). Reboot. If you can not complete this step, continue with step # 6
6.) Even if you were able to uninstall Avast! in step # 5, it is important to run avastclear.exe in Safe Mode.
How to use avastclear: http://www.avast.com/en-us/faq.php?article=AVKB10#idt_02
NOTE: When executing avastclear, it will ask to be run in safe Mode so follow instructions.
7.) Reinstall fresh copy of Avast! and reboot.
Be aware. Avast! will offer Chrome during installment. Remember to opt-out if you do not want it.
Thank you for your kind reply, there were no barriers . I understood the answers given and the mannor in which they were given.
Here is what I did. I just went into control panel and uninstalled from there and reinstalled new one from link above, Is that o.k. There is only one avast listed under programs and features now.
no I did not use avastclear.exe nor attempt to go into safe mode.
Thank you again for your patience and kindness.
You are welcome.
If Avast is working as it should be, and all types of scans are showing now, I would say you are set to go.
Avastclear is run just to make sure no corrupted file will hinder the new installation.
Thank you, all seems well. I now have options on what scan to run and how and I am doing a whole system scan now to check for a virus that may be lurking lol.
Are there any special settings I need to set up or does it do that on its own upon setup.
I thank you again.
If you are worry about your system might be infected, Follow this guide: http://forum.avast.com/index.php?topic=53253.0
Open a new topic and attach ( Do not copy/paste ) logs for Malwarebytes ( MBAM ), Farbar Recovery Scan Tool ( FRST ), and aswMBR.exe ( you find these programs in the guide above ) here:
http://forum.avast.com/index.php?board=4.0
Where an expert in the removal of malware will help you.
Avast is set up as default to give you the best protection and best performance to run in your system. Any settings you change will give different results, and the user must be awared and prepared for. Better to read the manual or faq before you change anything. You can also click on the upper ? symbol to your right on any Avast window you open to learn how things work.
Nothing was found but I thank you for the info. It did say some files could not be scanned, should I be concerned. I don’t know how o copy and paste them here or even if it is safe to do that on line.
status says error archive is passward protected. They are all downloads .
I thank you again.
Avast gives two kind of results for its analysis. Threats and Warnings. Threats is your typical file that can be considered malware. Warnings are files that Avast could not, for whatever reason, scanned properly. In your case they are password protected so Avast could not open them and see what was inside them. Nothing to be concerned about it.
It is always better to attach an image of Avast ( screenshot/screen capture ). Be it a error, alert, scan result, or whatever is in the Virus Chest by opening “Attachments and other options”. See image
How to make a screenshot: http://www.wikihow.com/Take-a-Screenshot-in-Microsoft-Windows