Slow opening programs
I've seen various posts about Bitdefender causing their computer to be slow, but I haven't seen anyone with my specific problem. My issue is some program take 30 seconds to open. In some cases, it's only the first time I open them. After that, it's fine. The problem goes away if I turn off Shield. I also found the problem is better if I enable "Scan only new and modified files", but ironically Bitdefender keeps disabling that setting after updates. When it's enabled, the slowness is more random but keeps happening. Biggest issue has been with Firefox (browser), XYplorer (file explorer), and PDF-Xchange (PDF viewer). It's worse on one computer, but still slow on others. All are Windows laptops, either Win 10 or 11. In fact, the beefiest laptop is the slowest. When I'm waiting 30 seconds for the program to open, I see bdservicehost taking 45-50 CPU. I've sent logs and allowed Bitdefender to remotely access my computer. No one is denying the issue, but there's not a fix. I uninstalled Bitdefender and installed another vendor's software, and having no issues. Thus, I don't think it's hardware related. Other than this, it's been a great product. Is this only occurring for me, or are others seeing it? Any suggestions?
Answers
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I have the exact same problem, no solutions except disabling some of the security options like Scan scripts and Scan command line. But by disabling them there is no reason to use and pay for Bitdefender.
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Thanks for the reply. I'm also struggling with disabling functionality at the risk of losing protection. Another person responded (post since removed) saying to add an exception. I tried that and it didn't help. I have another ticket open about exceptions not working which has been confirmed but not yet fixed. If anyone else has a suggestion for a targeted fix (exclude a file, not an entire feature), I'd appreciate it.
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Same problem here! It takes 5-30 seconds to open some programs. It only happens on first open after PC start. VLC player takes "only" 5 second but PDF-XChange 20-30! I run a fully patched W10 Pro and have a lot of memory and disk space. A second open is quicker but still takes a second or two. I used another antivirus before (the one with "Russian" connection!) and never had such problems.
I will start playing with different settings and will post my findings here.
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Hi again!
I did some tests deactivating one function at a time and found a culprit, at least in my case. When I switched on "Scan only new and modified files" all delays disappeared! In my relatively secure home environment I can live with that choice. However it's still a mystery that security scan of a single program can take 20-30 seconds. Hopefully Bitdefender-team will find a real solution in near future.
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(A) Scan Only New and Modified Files: This setting significantly speeds up scans, as Bitdefender checks only the files that have changed since the last scan. This is a reasonable choice in a secure environment where the likelihood of encountering new threats is low.
(B) 20-30 Second Scan Delay: Even with the above setting enabled, scans can still cause noticeable delays. This indicates that Bitdefender’s scanning process, even for single programs, is quite thorough. The delay can be attributed to several factors:
- Deep File Analysis: Bitdefender might be employing advanced heuristics and behavioral analysis to detect even subtle signs of malware, which takes time.
- Cloud Scanning: The program might be sending file information to Bitdefender’s cloud servers for further analysis, contributing to the delay.
- System Resource Usage: Antivirus scans inherently consume CPU and other system resources, which can impact performance.
@camarie, is there anything to add here?Regards
Life happens, Coffee helps!
Show your Attitude, when you reach that Altitude!
Bitdefender Ultimate Security Plus (user)
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Just to clarify, Scan Only New and Modified Files does make a significant difference. The problem kept coming back but then realized it was because Bitdefender updates would reset (disable) that setting. After watching closely, I concluded this setting makes a big improvement but the problem still happens randomly even when enabled. It's not a complete solution, but does make it better.
Also, I assumed adding an exclusion would stop whatever is causing the slowness since it should ignore the program. However, the slowness still occurs when excluded. I think that's a different bug.
I'm also not sure if the slowness is related to scanning the program, or the file the program is opening. For Firefox, it's the program being scanned. When double clicking on a PDF, both the program and file are being loaded. I noticed the size of the PDF files doesn't change the time to open. It's 30 seconds regardless if the PDF is 50K or 20MB. Thus, it seems to be the program, not file.
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My comment was in response to @JanGr specific comment, as you can see since I only quoted his comment before answering. Furthermore, for an answer to your post/comment, @camarie will get back to you, as he is one of the software developers at Bitdefender.
Regards
Life happens, Coffee helps!
Show your Attitude, when you reach that Altitude!
Bitdefender Ultimate Security Plus (user)
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I am no expert in the scanning area, but I think Flexx is right. It is probably related to the OnAccess feature that is triggering scans. I think, however, it is the file scan - the executable must have a some form of caching/signature check, otherwise all executables will crawl - that takes a longer time. The engines loaded are the same not mater the file size. But, again, I am no expert - and this is why I will forward this to my team, maybe they can come up with a more precise explanation than I can.
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So I talked to the guys and:
- the setting that does not sometimes persist/reset after update: an issue is filed and scheduled for the next release
- 20-30 seconds: reproduced. We will look first in logs why it takes that time (most likely we will have to report it to the team doing scan after we evaluate what exactly happens in product).
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