Dentially.info is an adware program, which significantly worsens the quality of user browsing. This adware cycling redirects the user to third-party sites that contain ads banners and displays pop-up ads. When you try to follow a link from a search query, your browser may be redirected to the completely different site with pop-ups.
Searchitnow.info or SearchItNow is a typical browser hijacker, which usually targets Mac users. First symptom of the virus infiltration is new homepage http://searchitnow.info on Google Chrome, Safari or Mozilla Firefox. Besides a new homepage, which is replaced without user permission, hijacker changes a default search engine and sometimes blocks all settings, related with browser homepages and search engines.
Lammbda.com is a browser hijacker coming to the PC without the user's consent and changing the settings of all the browsers installed in your system, such as Chrome, Mozilla, IE, and others. This sets https://lammbda.com/ as the default homepage and search engine.
If you notice that the browser homepage and the search engine is changed to https://foobaroo.com/index.php?a=web&q=, then most likely it means that your browsers have been attacked by Foobaroo.com.
POLICJA!!! Ransomware is a cryptovirus, in other words, an extortioner encrypting user files using AES algorithms. It attacks many user files (PDF files, office documents, archives, multimedia files and so on) and makes them unusable for further use, changing its extensions to .##___POLICJA!!!___TEN_PLIK_ZOSTA.