avast disappear

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while i was on the web avast stop working. i try to fix reinstall but it dosent work. what can i do?

[Asyn]

Nothing to work with, provide details...

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yesterday i installed avast for atrail. today i surfed on avs4you web site, suddenly a black screen for a second. avast icon disappeared. i ternd on the comp.. on safe mode and trided to fix it without any success.

[Asyn]

- Which Avast..? (Free/Pro/IS/Premier)
- Which version..?
- OS..? (32/64 Bit..? - which SP/Build..?)
- Other security related software installed..?
- Which AV(s) did you use before Avast..?

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- Which Avast..? Premier
- Which version..? - last
- OS..? -  32 Bit/ win 7 SP 1
- Other security related software installed..? -  iobit asc, win defender
- Which AV(s) did you use before Avast.. - avira

[Asyn]

First, be sure to get rid of all remnants of your prior installed AV(s)..!!
-> https://support.avast.com/article/11/

Second, get rid of Iobit stuff and disable WD.

Then:
1. Download Avast Premier Antivirus: https://files.avast.com/iavs9x/avast_premier_antivirus_setup_offline.exe
2. Follow instructions: https://www.avast.com/uninstall-utility (Run this tool for all prior installed Avast versions..!!)
3. Reinstall Avast with the downloaded installer from point 1.
4. Reboot.

[REDACTED]

hi, thank's alot. I've done all the guidelines and now everything is working properly. 

[Asyn]

You're welcome.