Hi, we are running IE11 and recently ( last 2 -3 weeks) seem to be having severe

We have a very recent reproduction of something very similar to what you report and there is a Tech Note in the process of being written. Microsoft and/or Appian will be addressing this. In mean time, here is some background and guidance:
Memory leak in Windows 7/Internet Explorer due to IE11 update 11.0.9600.18059, released 10/13/2015 via KB3093983. This is caused by a memory leak in the spelling correction add-on. As a temporary work-around, those experiencing this issue can disable spelling correction as follows:

o Click the gear icon in the top right of the IE browser
o Click "Manage add-ons"
o Click "Spelling Correction" on the bottom of the left-hand list
o Uncheck the box next to "Enable Spelling Correction"
o Close and re-open IE11

We have a very recent reproduction of something very similar to what you report and there is a Tech Note in the process of being written. Microsoft and/or Appian will be addressing this. In mean time, here is some background and guidance:
Memory leak in Windows 7/Internet Explorer due to IE11 update 11.0.9600.18059, released 10/13/2015 via KB3093983. This is caused by a memory leak in the spelling correction add-on. As a temporary work-around, those experiencing this issue can disable spelling correction as follows:

o Click the gear icon in the top right of the IE browser
o Click "Manage add-ons"
o Click "Spelling Correction" on the bottom of the left-hand list
o Uncheck the box next to "Enable Spelling Correction"
o Close and re-open IE11