Help!! lenovo a850 bootloop

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Help!!! I am stuck
I have a Lenovo A850 and I got a virus and had to restore the system. I found an update.zip for the A850 and installed via sdcard it worked fine.

Then I installed twrp, big mistake! after which my phone only boots into the trwp menu when I reset with pwr+vol-up+vol-dn

Now the twrp recovery wont run the update.zip and I cannot get back to the original boot menu before twrp.

I have tried dozens of flash rom but I am still in a loop stuck at the lenovo boot logo

I cannot flash with usb as my usb only charges, it has no connection with PC.

How can I remove/bypass the twrp boot menu and return to the stock recovery??

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Well I found my answer and all has been fixed, then I downloaded RM1.33_by_AdrenoBPC.zip to my sdcard from this site [Only registered and activated users can see links Click here to register] and ran from twrp menu (this zip includes playstore in the load)

This got me back into the system, but then I updated twrp to latest version and could not access the twrp menu by holding pwr+vol settings, or any other settings, so no recovery!!

Then I flashed the cwm image with mobileuncle app which got rid of twrp.
I used a site like this in XDA to do this [Only registered and activated users can see links Click here to register] cannot find the exact site but this is similar)

Now I can get into cwm recovery using the holding pwr+vol settings method and all is well

Just wanted to post here for anyone else having the same problem

[Ninja^F.U.B.A.R.]

Thank you for report. What is this file RM1.33? What does it do exactly?

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It is a flash zip recovery file, you run it from the recovery menu and it flashes a new stock version for Lenovo A850 with playstore included?

You obviously lose your data, it is for emergency recovery, as in my case when I had no hope of recovering my system